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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 1. brain function - 2. blood flow - 3. willing female
sigmoid flexure
dry-off time in dairy cattle
what has to happen for males for copulation to occur
sperm cell
2. Produce testosterone. located between the seminiferous tubules
leydid or interstitial cells
colostrum
testis (gonads)
sertoli cells
3. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days
Dairy Cattle Gestation
epididymis: definition - 3 parts - 4 functions
estrus
mare estrus cycle
4. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.
mare gestation
estrous
colostrum
#1 cost in production
5. (LH) causes female's egg to break (her period)
reason for seasonal breeding periods
vulva
Lutinizing Hormone in females
reason for seasonal breeding periods
6. 283 days
growth lost from castration methods (knife & band)
cow gestation
cow estrus cycle
Parturition
7. When are steers and heifers weaned from bottle feeding?
mastitis
feeding a high producing dairy cow
Brown Swiss Cow
6-8 weeks
8. 1-2 days
polyestrous
testosterone
mastitis
ewe estrus
9. 19-23 (21) days
Dairy Cattle Gestation
van deferens
penis and prepuce observation (BSE)
sow estrus cycle
10. Failure to have both testis (gonads) descend
oviducts
why does the cow need fat deposits during pregnancy?
uterus
cryptorchid
11. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total
sow estrus cycle
testis (gonads)
feeding a high producing dairy cow
urethra
12. Provide nourishment for the developing sperm
sertoli cells
Parturition
seminiferous tubules
cryptorchid
13. Microscopic - make sure not sterile - very few bulls are actually tested
Dairy calves are removed from cow at birth to...
semen evaluation (BSE)
libido test (BSE)
Culls bulls earlier (2 reasons)
14. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
Hard
dartos muscle
elastrator
Reasons for gestation length being affected
15. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase
seasonally polyestrous
femininity of a heifer
eminal vesicles
age and castration
16. Luteolysis happens because of the ____________ hormone
penis and prepuce observation (BSE)
prostaglandin
reasons for castration
cow ovulation
17. ~305 days (altough often longer due to breeding difficulties)
Dairy Cattle Lactation (standard)
testosterone
kidney stones also called ________ ___________ can develop in the sigmoid flexure
mare estrus cycle
18. (FSH) causes egg to mature in females
monestrous
Follical Stimulating in females
age and castration
spermatogenesis
19. % of fat in milk. makes cheeses and ice cream. regulates cost of milk
purpose of Breeding Soundness Exam (BSE) for males
butterfat
stag
reason for seasonal breeding periods
20. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.
Size of cow in relation to the amount of milk produced
elastrator
ewe's estrous cycle
colostrum
21. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.
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22. ~305 days (altough often longer due to breeding difficulties)
Dairy Cattle Lactation (standard)
~1 month
Mares
cow gestation
23. Sperm is produced here
rectal palpation (BSE)
estrus
seminiferous tubules
feeding a high producing dairy cow
24. Sperm production
Dairy Cattle Lactation (standard)
spermatogenesis
Dairy Cattle milking schedule
Brown Swiss Cow
25. Not under a timeline - cow can not be sold as steak
Grading choice
sperm cell
4 major reasons for culling dairy cows
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
26. Sperm is produced here
Bull's fibro-elastic penis
mare gestation
visual evaluation (BSE)
seminiferous tubules
27. The more stressed out the male is - the less sperm he is going to produce
humans: stress level vs sperm
mastitis
polyestrous
Dairy Cattle milking schedule
28. Way to know everything is alright with the breeding male
purpose of Breeding Soundness Exam (BSE) for males
urethra
pelvis
semen evaluation (BSE)
29. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
Reasons for gestation length being affected
hormones
normal presentation of the fetus
eminal vesicles
30. FEED
uterus
Avg. bull specs
burdizzo
#1 cost in production
31. What helps regulate spermatogenesis?
testosterone
effects of BST
sertoli cells
pelvis
32. 1-3 days
humans: stress level vs sperm
why does the cow need fat deposits during pregnancy?
purpose of Breeding Soundness Exam (BSE) for males
sow estrus
33. Male on one pin and female on other side
mastitis
uterus
libido test (BSE)
stag
34. Provide nourishment for the developing sperm
sertoli cells
mare gestation
Sperm survival specs
uterus
35. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
Jersey Cow
humans: stress level vs sperm
mare estrus cycle
effects of estrogen
36. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total
accessory sex glands
cow estrus
testis (gonads)
butterfat
37. Microscopic - make sure not sterile - very few bulls are actually tested
leydid or interstitial cells
semen evaluation (BSE)
testosterone
eminal vesicles
38. Can survive ~7 days in cow. vast majority <48 hours
Sperm survival specs
functions of progestrone
ewe estrus
4 major reasons for culling dairy cows
39. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co
retractor muscles
mare estrus cycle
effects of BST
~1 month
40. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.
retractor muscles
cow estrus
Dairy Cattle Lactation (standard)
colostrum
41. Animals which have only one estrous cycle (ex: dog - fox)
colostrum
Dairy Cattle milking schedule
organs used in spermatogenesis
monestrous
42. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)
mare's estrous cycle
prostate gland
penis sizes vs delivering methods
seminiferous tubules
43. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
Where livelihood is in agriculture
cow gestation
#1 cost in production
cervix
44. Milk ~305 days - dry 60 days prior to calving
4 major reasons for culling dairy cows
Follical Stimulating in males
Dairy Cattle milking schedule
estrous
45. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.
monorchid
polyestrous
reason for seasonal breeding periods
penis sizes vs delivering methods
46. 265-285 days
libido test (BSE)
Dairy Cattle Gestation
cow gestation
Blood
47. 14-19 (17) days
Lutinizing Hormone in males
Dairy calves are removed from cow at birth to...
ewe estrus cycle
polyestrous
48. 114 days
ewe's estrous cycle
penis and prepuce observation (BSE)
sow gestation
Bull's fibro-elastic penis
49. Duct through penis that carries sperm and urine
Size of cow in relation to the amount of milk produced
urethra
age and castration
visual evaluation (BSE)
50. Start of the reproductive tract for the female. located outside of the body
seasonally polyestrous
Size of cow in relation to the amount of milk produced
vulva
penis sizes vs delivering methods